The foregoing are only a few of the multitude of photochemical reactions and other effects of radiant energy.
We must therefore conclude that the heliotropic curvature of the polyps is determined by a photochemical action of the light.
Scheele's work aroused much interest in photochemical effects and many investigations followed.
The product of photochemical decomposition no longer forms azo-colours with amines or phenols.
photochemistry pho·to·chem·is·try (fō'tō-kěm'ĭ-strē)
The branch of chemistry that deals with the effects of light on chemical systems.